Type "Enclosure" under your name. If you have included a document other than the letter along with the letter, double space after you type your name for your signature, and type your enclosure notation. If you've included more than one document, use the plural "Enclosures" and indicate the number of enclosures afterward.

The absolute simplest way to format your letter is just to write "Enclosures" followed by the number of them in parentheses. So, for example, if you were sending a product brochure and three photos, your notation would read "Enclosures (4)." This method works well when you want a short, simple enclosure notation.